react native-expo：有没有办法console.log“推送通知”的令牌？

Question

有没有办法console.log“推送通知”的令牌？ 我尝试查看我的令牌，但我不知道该怎么做。 在我的代码中，我以天蓝色登录，我想获取“推送通知”的令牌 它对我不起作用。

我也在app.json中定义了

：

 "android": {
    "googleServicesFile": "./google-services.json"

什么也没有发生，所以很困惑理解我的问题以获得此令牌。

import React from "react";
import { StyleSheet, Text, View } from "react-native";
import { AzureInstance, AzureLoginView } from "react-native-azure-ad-2";
// import { createDrawerNavigator } from '@react-navigation/drawer';
 import PlacesNavigator from "./navigation/PlacesNavigator";
import { enableScreens } from "react-native-screens";

let token = await Notifications.getExpoPushTokenAsync();  //////HERE I TRY CONSOLE
console.log("this is the token :",token)


enableScreens();//function for more improve in screens movment
const credentials = {
  client_id: "1234",
  scope: "User.Read"
};

export default class App extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      azureLoginObject: {},
      loginSuccess: false
    };
    this.azureInstance = new AzureInstance(credentials);
    this._onLoginSuccess = this._onLoginSuccess.bind(this);
  }

  _onLoginSuccess() {
    this.azureInstance
      .getUserInfo()
      .then(result => {
        this.setState({
          loginSuccess: true,
          azureLoginObject: result
        });
        console.log(result);
      })
      .catch(err => {
        console.log(err);
      });
  }

  render() {
    if (!this.state.loginSuccess) {
      return (
        <AzureLoginView
          azureInstance={this.azureInstance}
          loadingMessage="Requesting access token"
          onSuccess={this._onLoginSuccess}
        />
      );
    }

    const { userPrincipalName, givenName } = this.state.azureLoginObject;

    return <PlacesNavigator />;
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: "#fff",
    alignItems: "center",
    justifyContent: "center"
  },
  text: {
    textAlign: "center",
    color: "#333333",
    marginBottom: 5
  }
});